What is the reason for the dog to eat grass

Dogs have a habit of licking their hair, and the dog hair that is licked down often accumulates in the gut, forming hairballs and causing discomfort to the dog. At this time, the dog will take the initiative to eat some fresh, green grass to help the body dog hair smoothly vomit out. Grass can provide a certain percentage of trace elements and nutrition for the dog, so the dog may eat grass because of the lack of trace elements in the body and nutritional deficiencies. If the dog eats grass frequently, the owner should give them timely adjustment of diet, if necessary, you can replace the dog food.